Pension and Other Employee Benefits (Schedule of Weighted-Average Year-End Benefit Obligation Assumptions) (Details)	Dec. 31, 2019	Dec. 31, 2018
Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	3.25%	4.28%
PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Discount rate	3.29%	4.31%
Health care trend rate	3.50%	4.00%
Minimum [Member] \| Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	3.00%	2.00%
Minimum [Member] \| PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	3.00%	2.00%
Maximum [Member] \| Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	8.00%	7.00%
Maximum [Member] \| PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	8.00%	7.00%
Weighted Average [Member] \| Pension Plan [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.40%	4.40%
Weighted Average [Member] \| PRB [Member]
Defined Benefit Plans and PRB Plans [Line Items]
Rate of compensation increase	4.50%	4.50%

Weighted average rate for present value of future retirement benefits cash flows, used to determine benefit obligation of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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- Definition

Weighted average rate increase of compensation, used to determine benefit obligation of defined benefit plan. Plan includes, but is not limited to, pay-related defined benefit plan.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(2)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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- Definition

Assumed rate, for next fiscal year, based on annual change in cost of health care cost benefits used to measure expected cost of benefits covered by defined benefit postretirement plan. Factors include, but are not limited to, estimate of health care inflation, change in health care utilization or delivery pattern, technological advances, and change in health status of participant. Excludes factors for change in composition of plan population by age and dependency status.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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